Java 链接中的PostMapping-GetMapping方法-loop存在问题。弹簧靴

我无法将数据发送到我的一个表。 下面您可以看到我的方法：一个是用表单显示模板，另一个是应该添加此操作的方法

@GetMapping("/addaction/{id}")
    public String addAction(Model model, @PathVariable("id") int id ) {

        Optional<PlantEntity> plantEntity = plantService.getPlantById(id);
        if (plantEntity.isPresent()) {
            model.addAttribute("plant", plantEntity.get());
        }



        return "addaction";
    }

    @PostMapping("/addaction/{id}")
    public String addAction(@ModelAttribute ActionForm actionForm,
                           @PathVariable("id") int plantId) {

        if(!userService.isLogin()) {
            return "redirect:/";
        }
        actionService.addAction(actionForm, plantId);
        return "redirect:/plant/"+plantId;
    }

还有我的模板：addaction.html

<form method="post" action="'/addaction/'+${plant.getId()}"
                    th:object="${actionForm}">

                    <div class="form-group">
                        <label for="exampleInputEmail1">Name of activity</label> <input
                            type="text" th:field="*{name}" class="form-control"
                            id="exampleFormControlInput1" aria-describedby="emailHelp"
                            placeholder="Name your work">
                    </div>

                    <div class="form-group">
                        <label for="exampleFormControlTextarea1">What you gonna
                            do?</label>
                        <textarea class="form-control" th:field="*{description}"
                            id="exampleFormControlTextarea1" rows="4"></textarea>
                    </div>


                    <div class="input-group mb-3">
                        <div class="input-group-prepend">
                            <label class="input-group-text" for="inputGroupSelect01">Month of activity</label>
                        </div>
                        <select class="custom-select" th:field="*{month}"
                            id="inputGroupSelect01">
                            <option value="1">January</option>
                            <option value="2">February</option>
                            <option value="3">March</option>
                            <option value="4">April</option>
                            <option value="5">May</option>
                            <option value="6">June</option>
                            <option value="7">July</option>
                            <option value="8">August</option>
                            <option value="9">September</option>
                            <option value="10">October</option>
                            <option value="11">November</option>
                            <option value="12">December</option>
                        </select>
                    </div>

                    <button type="submit" class="btn btn-dark">Action!</button>

                </form>

活动名称
你要干什么
做
活动月份
一月
二月
前进
四月
也许
六月
七月
八月
九月
十月
十一月
十二月
行动

主要问题是：当我尝试添加操作时，结果是：

'/addaction/'+$%7Bplant.getId（）%7D

---

有一种循环。我做错了什么？谢谢你抽出时间

您不必通过

”

。spring表达式语言也将在没有

的情况下使用

尝试删除如下所示

action=“/addaction/${plant.getId（）}”

请参阅
Try
“/addaction/${plant.getId（）}”
谢谢！这个案例稍微复杂一点，但您的链接非常有用：）它与：th:action=“@{/addaction/{id}（id=${plant.getId（）}）”一起工作
<form method="post" action="'/addaction/'+${plant.getId()}"
                    th:object="${actionForm}">

                    <div class="form-group">
                        <label for="exampleInputEmail1">Name of activity</label> <input
                            type="text" th:field="*{name}" class="form-control"
                            id="exampleFormControlInput1" aria-describedby="emailHelp"
                            placeholder="Name your work">
                    </div>

                    <div class="form-group">
                        <label for="exampleFormControlTextarea1">What you gonna
                            do?</label>
                        <textarea class="form-control" th:field="*{description}"
                            id="exampleFormControlTextarea1" rows="4"></textarea>
                    </div>


                    <div class="input-group mb-3">
                        <div class="input-group-prepend">
                            <label class="input-group-text" for="inputGroupSelect01">Month of activity</label>
                        </div>
                        <select class="custom-select" th:field="*{month}"
                            id="inputGroupSelect01">
                            <option value="1">January</option>
                            <option value="2">February</option>
                            <option value="3">March</option>
                            <option value="4">April</option>
                            <option value="5">May</option>
                            <option value="6">June</option>
                            <option value="7">July</option>
                            <option value="8">August</option>
                            <option value="9">September</option>
                            <option value="10">October</option>
                            <option value="11">November</option>
                            <option value="12">December</option>
                        </select>
                    </div>

                    <button type="submit" class="btn btn-dark">Action!</button>

                </form>